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CN104750674B - A kind of man-machine conversation's satisfaction degree estimation method and system - Google Patents

A kind of man-machine conversation's satisfaction degree estimation method and system Download PDF

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CN104750674B
CN104750674B CN201510086568.4A CN201510086568A CN104750674B CN 104750674 B CN104750674 B CN 104750674B CN 201510086568 A CN201510086568 A CN 201510086568A CN 104750674 B CN104750674 B CN 104750674B
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machine conversation
training
session characteristics
satisfaction
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CN104750674A (en
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罗欢
李�杰
汤鹏飞
王智
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Beijing Jingdong Century Trading Co Ltd
Beijing Jingdong Shangke Information Technology Co Ltd
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Beijing Jingdong Century Trading Co Ltd
Beijing Jingdong Shangke Information Technology Co Ltd
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Abstract

The present invention discloses a kind of man-machine conversation's satisfaction degree estimation method and system, and method includes: the satisfaction training data for obtaining multiple trained man-machine conversations;To train the session characteristics of man-machine conversation as training sample, disaggregated model training is carried out using corresponding satisfaction result as target value, obtains disaggregated model;Practical man-machine conversation is obtained, the session characteristics of the practical man-machine conversation are extracted, the session characteristics of the practical man-machine conversation are inputted into the disaggregated model and obtain the satisfaction result predicted by disaggregated model.The present invention is when predicting satisfaction, it can be easy to add or delete the session characteristics for influencing prediction, and pass through statistical, it no longer needs directly to consider the weight that each feature specifically needs to set, and it only needs to select suitable disaggregated model, study using disaggregated model to training sample, is automatically performed weight setting.

Description

A kind of man-machine conversation's satisfaction degree estimation method and system
Technical field
The present invention relates to especially a kind of man-machine conversation's satisfaction degree estimation method and system of man-machine conversation's correlative technology field.
Background technique
Question answering system is the natural language text sentence that can identify user's input, and makes the computer journey accordingly answered Sequence.It is analyzed by the processing to user's read statement, final to execute user's request, the information that user is concerned about is returned to, wherein wrapping Containing natural language processings the relevant technologies such as sentence participle, Entity recognition, semantics recognition, task processing and responses.
In question answering system, the accuracy of answer, real-time, pleasantly surprised property etc. is all important index, and improves these The final purpose of performance is provided to serve client, allows customer satisfaction.In order to preferably serve customer service, need to know assorted The user of sample when can satisfaction, thus can targetedly to may dissatisfaction client carry out volume Outer operation.
Existing satisfaction degree estimation is mainly predicted by the manually mode of laying down a regulation, for example is occurred in user's question Negative emotions, then it is assumed that the possible dissatisfaction of client, for another example client was to like playing satisfaction customer service in the past, then it is assumed that client will not Then short shot meaning degree etc. formulates weight to various modes, then weighting finds out last satisfaction degree estimation situation.
However, being then weighted ballot is a kind of more original processing mode by laying down a regulation, need a large amount of It tests to adjust the weights of various rules, if rule type is excessive, and when certain association is individually present, artificial treatment is multiple Miscellaneous degree can growth at double, it is also not convenient for safeguarding;Some pairs of satisfactions are not the rules directly affected, are not allowed easy to handle yet.
Summary of the invention
Based on this, it is necessary to for the prior art pair technical problem complex with the satisfaction degree estimation of client, provide A kind of man-machine conversation's satisfaction degree estimation method and system.
A kind of man-machine conversation's satisfaction degree estimation method, comprising:
Training data collection step, comprising: the satisfaction training data of multiple trained man-machine conversations is obtained, it is each described full Meaning degree training data includes user about the satisfaction result of this time training man-machine conversation and in this time training man-machine conversation Extracted session characteristics;
Corpus training step, comprising: to train the session characteristics of man-machine conversation as training sample, with corresponding satisfaction As a result disaggregated model training is carried out as target value, obtains disaggregated model, the disaggregated model is by the session as training sample Feature carries out classification with the satisfaction result as target value and is associated with;
Satisfaction degree estimation step, comprising: practical man-machine conversation is obtained, the session characteristics of the practical man-machine conversation are extracted, The session characteristics of the practical man-machine conversation are inputted into the disaggregated model and obtain the satisfaction result predicted by disaggregated model.
A kind of man-machine conversation's satisfaction degree estimation system, comprising:
Training data collection module, is used for: the satisfaction training data of multiple trained man-machine conversations is obtained, it is each described full Meaning degree training data includes user about the satisfaction result of this time training man-machine conversation and in this time training man-machine conversation Extracted session characteristics;
Corpus training module, is used for: to train the session characteristics of man-machine conversation as training sample, with corresponding satisfaction As a result disaggregated model training is carried out as target value, obtains disaggregated model, the disaggregated model is by the session as training sample Feature carries out classification with the satisfaction result as target value and is associated with;
Satisfaction degree estimation module, is used for: practical man-machine conversation obtained, the session characteristics of the practical man-machine conversation are extracted, The session characteristics of the practical man-machine conversation are inputted into the disaggregated model and obtain the satisfaction result predicted by disaggregated model.
The present invention is pre- to practical man-machine conversation progress satisfaction using disaggregated model by being trained to disaggregated model It surveys, when predicting satisfaction, can be easy to add or delete the session characteristics for influencing prediction, and by statistical, no It needs directly to consider the weight that each feature specifically needs to set again, and only needs to select suitable disaggregated model, utilize classification Study of the model to training sample, is automatically performed weight setting.
Detailed description of the invention
Fig. 1 is a kind of work flow diagram of man-machine conversation's satisfaction degree estimation method of the present invention;
Fig. 2 is a kind of structure chart of man-machine conversation's satisfaction degree estimation system of the present invention.
Specific embodiment
The present invention will be further described in detail in the following with reference to the drawings and specific embodiments.
It is as shown in Figure 1 a kind of work flow diagram of man-machine conversation's satisfaction degree estimation method of the present invention, comprising:
Step S101, comprising: obtain the satisfaction training data of multiple trained man-machine conversations, each satisfaction training Data include that user trains the satisfaction result of man-machine conversation about this time and trains in this time extracted in man-machine conversation Session characteristics;
Step S102, comprising: to train the session characteristics of man-machine conversation as training sample, with corresponding satisfaction result Disaggregated model training is carried out as target value, obtains disaggregated model, the disaggregated model is by the session characteristics as training sample Classification is carried out with the satisfaction result as target value to be associated with;
Step S103, comprising: practical man-machine conversation is obtained, the session characteristics of the practical man-machine conversation are extracted, it will be described The session characteristics of practical man-machine conversation input the disaggregated model and obtain the satisfaction result predicted by disaggregated model.
The present invention obtains multiple satisfaction training datas, and the feature extraction that conversates in step s101, in step Disaggregated model training is carried out in S102 using session characteristics as training sample, obtains disaggregated model.Disaggregated model includes that logic is returned Return, the models such as vector machine (Support Vector Machine, SVM), random forest, is that example is assigned to by various features The model of one known classification.In step s 103, session characteristics are extracted from the practical man-machine conversation got, and inputted The obtained disaggregated model of step S102 training, thus the satisfaction result after being predicted.
The present invention can be easy to add or delete the session characteristics for influencing prediction, and by statistical, no longer need Directly to consider the weight that each feature specifically needs to set, and only need to select suitable disaggregated model, utilize disaggregated model Study to training sample, is automatically performed weight setting.
When obtain by disaggregated model predict satisfaction result after, can use the satisfaction as a result, adjusting man-machine meeting Strategy is answered by robot in words, or is alerted to prompt the artificial customer service in backstage to follow up.
In one of the embodiments, further include:
Alarm step, comprising: if meeting preset warning condition by the satisfaction result that disaggregated model is predicted, to The artificial customer service alarm device docked with the man-machine conversation issues warning information.
In the present embodiment, when satisfaction result meets preset warning condition, then issued in artificial customer service alarm device Warning information reminds artificial customer service auxiliary robot services client.Warning condition is configured according to satisfaction result, such as such as Fruit satisfaction result is only satisfied or is unsatisfied with the two, then warning condition are as follows: and " satisfaction result is dissatisfied ", if satisfaction As a result using star identify, such as it is most satisfied be five-pointed star, satisfaction be four stars, generally Samsung, be discontented with mean two stars, least be satisfied with For a star, then warning condition can be with are as follows: " satisfaction result is less than Samsung ".Specific setting those of ordinary skill in the art are readding It can be arranged according to the actual situation after reader patent.
Session characteristics can be with are as follows: the type of customer problem, user sources entrance, user seek advice from Taxonomy Information etc..
In one of the embodiments:
The trained man-machine conversation includes at least one training user's problem, the extracted session in training man-machine conversation Feature includes: the Questions types as made of training user's problem conversion;
The practical man-machine conversation includes at least one actual user's problem, the extracted session in practical man-machine conversation Feature includes: the Questions types as made of actual user's problem conversion.
The list of Questions types is converted to for training user's problem as shown in table 1, actual user's problem, which is converted to, asks Topic type can be realized using same or similar mode.
SessionID Customer problem Questions types User sources entrance …… Satisfactory result
Session1 How this commodity is out of stock Commodity stocks inquiry Online It is satisfied
Session1 When arrival It is when available in stock Online
Session2 I has descended an order Order inquiries Other It is dissatisfied
Session2 When arrival Distribution time Other
Session3 You are good Greeting Other It is satisfied
Session3 When available in stock this commodity is It is when available in stock Other
In table 1, SessionID is for identifying trained man-machine conversation, and identical trained man-machine conversation is using same SessionID.Customer problem can extract keyword therein using existing semantic analysis and word division methods, thus will It is referred in suitable Questions types.
In man-machine conversation, user proposes various problems to robot, and robot makes a response according to problem, automatic to carry out It answers.The problem of different type, the satisfaction of user is different, for example, for when it is available in stock such issues that, due to machine People can obtain information from the deposit system of storehouse, therefore can answer customer problem well, therefore be easy that user is allowed to please oneself, and For other problems, robot may may not can obtain accurate answer or robot may not can accurate understanding user ask Topic, such situation are easier to that user is allowed to feel discontented.Therefore the session characteristics of user are classified as Questions types, and root by the present invention The satisfaction of user is judged according to Questions types.
In one of the embodiments:
The extracted session characteristics in training man-machine conversation further include: the trained man-machine conversation's carrys out source inlet;
The extracted session characteristics in practical man-machine conversation further include: the practical man-machine conversation's carrys out source inlet.
Example as shown in table 1, the different source inlets that comes will lead to the difference of information acquired in robot, therefore, by not The same source inlet that comes distinguishes the accuracy that can increase satisfaction degree estimation.
In one of the embodiments:
Feature vector will be converted to by extracted session characteristics in training man-machine conversation, in the step S102, with instruction The corresponding feature vector of session characteristics for practicing man-machine conversation carries out disaggregated model training, described eigenvector packet as training sample It includes and enters with the source of the extracted corresponding Questions types of session characteristics and the trained man-machine conversation in training man-machine conversation The one-to-one position of mouth, and it is corresponding with the corresponding Questions types of session characteristics included by training man-machine conversation in feature vector Position position, come the corresponding position position of source inlet with training man-machine conversation in feature vector;
Feature vector will be converted to by extracted session characteristics in practical man-machine conversation, in the step S103, with reality The corresponding feature vector of the session characteristics of border man-machine conversation inputs the disaggregated model and obtains the satisfaction predicted by disaggregated model Degree is as a result, described eigenvector includes Questions types corresponding with session characteristics extracted in practical man-machine conversation and described Practical man-machine conversation's comes the one-to-one position of source inlet, and in feature vector with session characteristics included by practical man-machine conversation The corresponding position of source inlet is come with practical man-machine conversation in feature vector in corresponding Questions types corresponding position position Position.
Session characteristics in same trained man-machine conversation or same practical man-machine conversation are merged into a feature vector, Consequently facilitating the training and calculating of subsequent classification model.
In one of the embodiments:
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to user Historical behavior feature;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to user's Historical behavior feature.
The historical behavior feature of user refers to user in the man-machine conversation of history to the history evaluation of satisfaction result. For example, if the satisfaction result majority of user be all it is satisfied, then same user is for the satisfaction in practical man-machine conversation As a result evaluation remains as satisfied probability with regard to larger.
In one of the embodiments: the man-machine conversation is purchase system man-machine conversation;
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to user Shopping status;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to user's Shopping status.
In shopping process, the different shopping status of user can have large effect to its satisfaction, such as user is under It is then easy to be discontented with if it is inquiry distribution time after list, and is easier to before placing an order if only when available in stock inquiry is It is satisfied.
As highly preferred embodiment of the present invention, made with the Liblinear that Chih-Jen doctor Lin of Taiwan Univ. develops For disaggregated model tool, wherein solverType (algorithm types) selects L2R_LR (the normalized logistic regression algorithm of L2), C (penalty factor) is set as 4.0, eps (iteration stopping threshold value) and is set as 0.01.
Wherein, data required for Liblinear training pattern input as a two-dimensional matrix, wherein every a line is one A sample vector, each column represent a feature, indicate that sample is all corresponding with one for each sample in the value of this feature A target value.
All input datas are trained to a model file by Liblinear, when needing to identify, input one A sample vector, so that it may predict its possible target value.
For satisfaction degree estimation, defining each logical session (including multiple question and answer) is a training sample, in multiple question and answer All features are merged into a feature vector, and user's authentic assessment result is as target value, for example, taking for the data of JIMI Data training in one month, extracts the features such as Questions types, entrance source, user gradation, if there is specific characteristic, characteristic value 1 is taken, for multivalue discrete features, resolves into multiple features, that Discrete Eigenvalue of appearance takes 1, for the spy not occurred Sign does not have to processing.
As shown in table 1, the two-dimensional matrix sample after conversion is as shown in table 2 for dialogue, reads corpus by program, and be converted to Liblinear need input format, formed training set training, obtain disaggregated model, then user come JIMI put question to when into Row prediction.
Table 2
By using disaggregated model, theoretical foundation is provided for whether prediction user session is satisfied with, and reduce people Work extracts, analyzes feature importance, and sets the time of weight, and when colleague has found useful attribute, addition verifying is also easy to.Have Satisfaction degree estimation, it is easier to grasp robot service user situation, and can make timely adjustment as the case may be, meet Different user demands.
It is illustrated in figure 2 a kind of structure chart of man-machine conversation's satisfaction degree estimation system of the present invention, comprising:
Training data collection module 201, is used for: obtaining the satisfaction training data of multiple trained man-machine conversations, Mei Gesuo Stating satisfaction training data includes user about the satisfaction result of this time training man-machine conversation and in the secondary training of human chance Extracted session characteristics in words;
Corpus training module 202, is used for: to train the session characteristics of man-machine conversation as training sample, with corresponding full Meaning degree result carries out disaggregated model training as target value, obtains disaggregated model, the disaggregated model will be as training sample Session characteristics carry out classification with the satisfaction result as target value and are associated with;
Satisfaction degree estimation module 203, is used for: obtaining practical man-machine conversation, the session for extracting the practical man-machine conversation is special The session characteristics of the practical man-machine conversation are inputted the disaggregated model and obtain the satisfaction knot predicted by disaggregated model by sign Fruit.
In one of the embodiments, further include:
Alarm module is used for: if meeting preset warning condition by the satisfaction result that disaggregated model is predicted, to The artificial customer service alarm device docked with the man-machine conversation issues warning information.
In one of the embodiments:
The trained man-machine conversation includes at least one training user's problem, the extracted session in training man-machine conversation Feature includes: the Questions types as made of training user's problem conversion;
The practical man-machine conversation includes at least one actual user's problem, the extracted session in practical man-machine conversation Feature includes: the Questions types as made of actual user's problem conversion.
In one of the embodiments:
The extracted session characteristics in training man-machine conversation further include: the trained man-machine conversation's carrys out source inlet;
The extracted session characteristics in practical man-machine conversation further include: the practical man-machine conversation's carrys out source inlet.
In one of the embodiments:
Feature vector will be converted to by extracted session characteristics in training man-machine conversation, in the corpus training step, Using train the corresponding feature vector of session characteristics of man-machine conversation as training sample carry out disaggregated model training, the feature to Amount include and training man-machine conversation in the extracted corresponding Questions types of session characteristics and the trained man-machine conversation come The one-to-one position of source inlet, and Questions types phase corresponding with session characteristics included by training man-machine conversation in feature vector The corresponding position position of source inlet is come with training man-machine conversation in feature vector in corresponding position position;
Feature vector, the satisfaction degree estimation step will be converted to by extracted session characteristics in practical man-machine conversation In, the disaggregated model is inputted with the corresponding feature vector of the session characteristics of practical man-machine conversation and obtains predicting by disaggregated model Satisfaction as a result, described eigenvector include Questions types corresponding with session characteristics extracted in practical man-machine conversation with And the practical man-machine conversation comes the one-to-one position of source inlet, and in feature vector with meeting included by practical man-machine conversation Talk about the corresponding position position of the corresponding Questions types of feature, in feature vector with practical man-machine conversation to carry out source inlet corresponding Position position.
In one of the embodiments:
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to user Historical behavior feature;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to user's Historical behavior feature.
In one of the embodiments: the man-machine conversation is purchase system man-machine conversation;
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to user Shopping status;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to user's Shopping status.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (8)

1. a kind of man-machine conversation's satisfaction degree estimation method characterized by comprising
Training data collection step, comprising: obtain the satisfaction training data of multiple trained man-machine conversations, each satisfaction Training data includes that user is mentioned about the satisfaction result of this time training man-machine conversation and in this time training man-machine conversation The session characteristics taken;
Corpus training step, comprising: to train the session characteristics of man-machine conversation as training sample, with corresponding satisfaction result Disaggregated model training is carried out as target value, obtains disaggregated model, the disaggregated model is by the session characteristics as training sample Classification is carried out with the satisfaction result as target value to be associated with;
Satisfaction degree estimation step, comprising: obtain practical man-machine conversation, the session characteristics of the practical man-machine conversation are extracted, by institute The session characteristics for stating practical man-machine conversation input the disaggregated model and obtain the satisfaction result predicted by disaggregated model;
The trained man-machine conversation includes at least one training user's problem, the extracted session characteristics in training man-machine conversation It include: the Questions types as made of training user's problem conversion;
The practical man-machine conversation includes at least one actual user's problem, the extracted session characteristics in practical man-machine conversation It include: the Questions types as made of actual user's problem conversion;
The extracted session characteristics in training man-machine conversation further include: the trained man-machine conversation's carrys out source inlet;
The extracted session characteristics in practical man-machine conversation further include: the practical man-machine conversation's carrys out source inlet;
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to going through for user History behavioural characteristic;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to the history of user Behavioural characteristic.
2. man-machine conversation's satisfaction degree estimation method according to claim 1, which is characterized in that further include:
Alarm step, comprising: if by disaggregated model predict satisfaction result meet preset warning condition, to institute The artificial customer service alarm device for stating man-machine conversation's docking issues warning information.
3. man-machine conversation's satisfaction degree estimation method according to claim 1, it is characterised in that:
Feature vector will be converted to by extracted session characteristics in training man-machine conversation, in the corpus training step, with instruction The corresponding feature vector of session characteristics for practicing man-machine conversation carries out disaggregated model training, described eigenvector packet as training sample It includes and enters with the source of the extracted corresponding Questions types of session characteristics and the trained man-machine conversation in training man-machine conversation The one-to-one position of mouth, and it is corresponding with the corresponding Questions types of session characteristics included by training man-machine conversation in feature vector Position position, come the corresponding position position of source inlet with training man-machine conversation in feature vector;
Feature vector will be converted to by extracted session characteristics in practical man-machine conversation, in the satisfaction degree estimation step, with The corresponding feature vector of the session characteristics of practical man-machine conversation inputs the disaggregated model and obtains expiring by what disaggregated model was predicted Meaning degree is as a result, described eigenvector includes Questions types corresponding with session characteristics extracted in practical man-machine conversation and institute That states practical man-machine conversation comes the one-to-one position of source inlet, and special with session included by practical man-machine conversation in feature vector It levies the corresponding position position of corresponding Questions types, comes the corresponding position of source inlet with practical man-machine conversation in feature vector Position.
4. man-machine conversation's satisfaction degree estimation method according to claim 1, it is characterised in that: the man-machine conversation is shopping System man-machine conversation;
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to the purchase of user Object state;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to the shopping of user State.
5. a kind of man-machine conversation's satisfaction degree estimation system characterized by comprising
Training data collection module, is used for: obtaining the satisfaction training data of multiple trained man-machine conversations, each satisfaction Training data includes that user is mentioned about the satisfaction result of this time training man-machine conversation and in this time training man-machine conversation The session characteristics taken;
Corpus training module, is used for: to train the session characteristics of man-machine conversation as training sample, with corresponding satisfaction result Disaggregated model training is carried out as target value, obtains disaggregated model, the disaggregated model is by the session characteristics as training sample Classification is carried out with the satisfaction result as target value to be associated with;
Satisfaction degree estimation module, is used for: obtaining practical man-machine conversation, the session characteristics of the practical man-machine conversation is extracted, by institute The session characteristics for stating practical man-machine conversation input the disaggregated model and obtain the satisfaction result predicted by disaggregated model;
The trained man-machine conversation includes at least one training user's problem, the extracted session characteristics in training man-machine conversation It include: the Questions types as made of training user's problem conversion;
The practical man-machine conversation includes at least one actual user's problem, the extracted session characteristics in practical man-machine conversation It include: the Questions types as made of actual user's problem conversion;
The extracted session characteristics in training man-machine conversation further include: the trained man-machine conversation's carrys out source inlet;
The extracted session characteristics in practical man-machine conversation further include: the practical man-machine conversation's carrys out source inlet;
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to going through for user History behavioural characteristic;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to the history of user Behavioural characteristic.
6. man-machine conversation's satisfaction degree estimation system according to claim 5, which is characterized in that further include:
Alarm module is used for: if by disaggregated model predict satisfaction result meet preset warning condition, to institute The artificial customer service alarm device for stating man-machine conversation's docking issues warning information.
7. man-machine conversation's satisfaction degree estimation system according to claim 5, it is characterised in that:
Feature vector will be converted to by extracted session characteristics in training man-machine conversation, in the corpus training step, with instruction The corresponding feature vector of session characteristics for practicing man-machine conversation carries out disaggregated model training, described eigenvector packet as training sample It includes and enters with the source of the extracted corresponding Questions types of session characteristics and the trained man-machine conversation in training man-machine conversation The one-to-one position of mouth, and it is corresponding with the corresponding Questions types of session characteristics included by training man-machine conversation in feature vector Position position, come the corresponding position position of source inlet with training man-machine conversation in feature vector;
Feature vector will be converted to by extracted session characteristics in practical man-machine conversation, in the satisfaction degree estimation step, with The corresponding feature vector of the session characteristics of practical man-machine conversation inputs the disaggregated model and obtains expiring by what disaggregated model was predicted Meaning degree is as a result, described eigenvector includes Questions types corresponding with session characteristics extracted in practical man-machine conversation and institute That states practical man-machine conversation comes the one-to-one position of source inlet, and special with session included by practical man-machine conversation in feature vector It levies the corresponding position position of corresponding Questions types, comes the corresponding position of source inlet with practical man-machine conversation in feature vector Position.
8. man-machine conversation's satisfaction degree estimation system according to claim 5, it is characterised in that: the man-machine conversation is shopping System man-machine conversation;
The extracted session characteristics in training man-machine conversation further include: the satisfaction training data corresponds to the purchase of user Object state;
The session characteristics extracted in practical man-machine conversation further include: the practical man-machine conversation corresponds to the shopping of user State.
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